Could someone modify this SMF theme for me?

[MitsukiSuzahari]

I was wondering if someone could make some minor adjustments to a SMF theme that I am using ^^ You can add your credits at the bottom if you want ^^ I just want to get rid of the blues and whites (in the background) and make them a darker grey! You don't need to worry about the header thing seeing as how I have that done but if someone could make it alot better for me I would be like forever greatful ^^
Site: Royal Graphics Forum
Theme: Black Vista Theme by Fussilet
Header Image:

Thanks for whoever does this I've worked with SMF for about a couple of years but never really learned how to modify the themes so I need someone to do it for me while I learn (because I'm known to screw things up bigtime)